Re: microcontroller programming -- how to begin

On Fri, 26 May 2006 15:40:09 GMT, Rich Grise <richgrise@xxxxxxxxxxx> wrote:
On Fri, 26 May 2006 04:41:43 +0000, Ignoramus5457 wrote:

On Thu, 25 May 2006 22:05:13 GMT, Rich Grise <richgrise@xxxxxxxxxxx> wrote:
On Thu, 25 May 2006 20:49:50 +0000, Ignoramus5457 wrote:
On Thu, 25 May 2006 13:35:06 -0700, xray <notreally@xxxxxxxxxxxxxxx> wrote:

It's an odd beastie. I never heard of ladder logic before, but seems to
be a combinational logic on inputs that happens in realtime. Equivalent
to stringing a bunch of switches in series/parallel strings.

Yes, seems to be similar to putting together a bunch of relays.

That's exactly what it is, or, more accurately, where it came from. PLCs
use it to substitute for huge panels of relays.
I did a quick google:
http://www.google.com/search?q=%22ladder+logic%22+tutorial

One of them even calls it "Relay Ladder Logic". :-)

I'm just guessing, but your ladder logic mode probably has some kind of
timer(s) available; I ass-u-me that that would be in the manual somewhere.

I am sure that it is the case. I have not yet gotten to reading about
ladder logic, yet.


It's probably worth studying - I once had a job where one of the tasks was
to debug a small sequencer where the original designer, who was aobut 80
years old, had used relay logic, and not knowing about ladder logic at the
time, it was a nightmare. Thinking back, if I'd redrawn the circuit in
ladder logic format, it would have been a snap.

Yep, I will try to make some simple designs side by side with ladderl
ogic and basic,and will try to see what is easier for me.

i

.

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